/* Floating Save (PUT /api/state) button */
#publishBtn {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 9999;
  border-color: rgba(124, 58, 237, 0.95);
  background: rgba(124, 58, 237, 0.38);
  box-shadow:
    0 14px 30px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(124, 58, 237, 0.35),
    0 0 22px rgba(124, 58, 237, 0.24);
  backdrop-filter: blur(6px);
  padding: 15px 24px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: 0.02em;
  border-radius: 14px;
}
#publishBtn:hover {
  background: rgba(124, 58, 237, 0.50);
  box-shadow:
    0 16px 34px rgba(0, 0, 0, 0.58),
    0 0 0 1px rgba(124, 58, 237, 0.45),
    0 0 28px rgba(124, 58, 237, 0.32);
}
#publishBtn:active {
  transform: translateY(1px);
}